Influence of magnetic field on isothermal pearlite transformation in Fe–C–Ni hypoeutectoid alloy
Influence of magnetic field on isothermal pearlite transformation in Fe–C–Ni hypoeutectoid alloy
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DOI：
10.1179/174328409x453235
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发表时间：
2010-03
影响因子：
1.8
通讯作者：
G. H. Zhang;M. Enomoto
中科院分区：
文献类型：
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作者：
G. H. Zhang;M. Enomoto
研究了8t外加磁场对Fe-0·4质量% C-2质量%Ni亚共析合金等温珠光体转变的影响，磁场加速了原共析铁氧体和珠光体的转变。随着反应温度的降低，珠光体的体积分数增加，但只有在低过冷时，磁场才使珠光体相对于预共析铁氧体的比例增加。磁场作用使珠光体的层间间距减小了5 ~ 15%，这可能是导致珠光体结核生长速度大幅提高的原因。虽然珠光体碳含量在准平衡γ/(γ+cem)相边界附近下降，但其他特征（如层间间距）似乎符合Fe-C基亚共晶合金中珠光体/奥氏体边界的非配分局部平衡条件。
The influence of an external magnetic field of 8 T on isothermal pearlite transformation was studied in an Fe–0·4 mass%C–2 mass%Ni hypoeutectoid alloy, in which both proeutectoid ferrite and pearlite transformations were accelerated by the field. Whereas the pearlite volume fraction increased with decreasing reaction temperature, the magnetic field increased the proportion of pearlite relative to proeutectoid ferrite only at low undercoolings. The interlamellar spacing of pearlite was reduced 5–15% by the magnetic field, which may have led to a substantial increase in growth rate of pearlite nodules. Whereas the pearlite carbon content fell near the paraequilibrium γ/(γ+cem) phase boundary, other features, e.g. interlamellar spacing, seem to be in accord with the condition of non-partition local equilibrium at the pearlite/austenite boundary as reported in Fe–C base hypoeutectoid alloys.